'Plimsoll's mark' definitions:
Definition of 'Plimsoll's mark'
From: GCIDE
- Plimsoll's mark \Plim"soll's mark`\ (Naut.) A mark conspicuously painted on the port side of all British sea-going merchant vessels, to indicate the limit of submergence allowed by law; -- so called from Samuel Plimsoll, by whose efforts the act of Parliament to prevent overloading was procured. [1913 Webster]